美制螺紋標準對照表

1、文檔來源為:從網(wǎng)絡(luò)收集整理.word 版本可編輯.歡迎下載支持美制螺紋標準對照表美制外螺紋（2A）常用規(guī)格極限尺寸表（粗牙）公稱尺寸和每英寸牙螺紋系大徑極限中徑極限螺胚直徑數(shù)列代號最小最大最小最大小徑max最小最大8-320.15710.16310.13990.14280.12483.583.61(0.164-32)3.99034.14273.55353.62713.169910-240.18180.18900.15860.16190.1379A CY7a d n(0.190-24)4.61774.80064.02844.11233.50274.074.1012-240.20780.21500

2、.18450.18790.1639a -79(0.216-24)5.27815.46104.68634.77274.16314.724.751/4-200.24080.24890.21270.21640.1876C ARc 21a(0.250-20)6.11636.32215.40265.49664.76505.455.485/16-180.30260.31130.27120.27520.2431A QA6.94A QO6.98(0.3175-18)7.68607.90706.88856.99016.17473/8-160.36430.37370.32870.33310.2970O A(8.4

3、0p A A8.44(0.375-16)9.25329.49208.34908.46077.54387/16-140.42580.43610.38500.38970.3485Q PQQ P7(0.4375-14)UNC10.815311.07699.77909.89848.85199.839.871/2-130.48760.49850.44350.44850.4041A A QA-1 A QQ(0.50-13)12.385012.661911.264911.391910.264111.3411.389/16-120.54950.56090.50160.50680.4587A Q on12.80

4、d Q 0/112.84(0.5625-12)13.957314.246912.740612.872711.65105/8-110.61130.62340.55890.56440.5119A A 9714.27A A QO14.32(0.625-11)15.527015.834414.196114.335813.00233/4-100.73530.74820.67730.68320.6255A 7 QO17.28d 7 QO17.33(0.750-10)18.676619.004317.203417.353315.88777/8-90.85920.87310.79460.80090.7368o

5、n 97on QO(0.875-9)21.823722.176720.182820.342918.714720.2720.321"-80.98300.99800.91000.91680.8446QQ OOQO 07(1.000-8)24.968225.349223.114023.286721.452823.2223.271. 螺胚直徑指滾絲前的尺寸，數(shù)值為依經(jīng)驗公式計算而得，在實踐中需驗證。2.標記示例：10-24UNC-2A域 0.190-24UNC-2A）、3/8-16UNC-2A（或 0.375-16UNC-2A） （注：表中上行斜體數(shù)值單位為英寸，下行為毫米）美制外螺紋（2A

6、）常用規(guī)格極限尺寸表（細牙）公稱尺寸和螺紋系大徑極限中徑極限螺胚直徑每英寸牙數(shù)列代號最小最大最小最大小徑max最小最大8-360.15770.16320.14240.14520.1291Q pc(0.164-36)4.00564.14533.61703.68813.27913.653.6710-320.18310.18910.16580.16880.1508(0.190-32)UNF4.65074.80314.21134.28753.83034.244.2712-280.20850.21500.18860.19180.1712A QC(0.216-28)5.29595.46104.79044.

7、87174.34854.824.851文檔來源為:從網(wǎng)絡(luò)收集整理.word 版本可編輯.歡迎下載支持1/4-280.24250.24900.22250.22580.20525.695.71(0.250-28)6.15956.32465.65155.73535.21215/16-240.30420.31140.28060.28430.26037.177.20(0.3175-24)7.72677.90967.12727.22126.61163/8-240.36670.37390.34300.34680.32288.758.78(0.375-24)9.31429.49718.71228.80878.

8、19917/16-200.42810.43620.39950.40370.374910.1910.23(0.4375-20)10.873711.079510.147310.25409.52251/2-200.49060.49870.46190.46620.437411.7811.82(0.50-20)12.461212.667011.732311.841511.11009/16-180.55240.56110.52050.52500.492913.2713.31(0.5625-18)14.031014.251913.220713.335012.51975/8-180.61490.62360.5

9、8280.58750.555414.8514.89(0.625-18)15.618515.839414.803114.922514.10723/4-160.73910.74850.70290.70790.671817.9117.95(0.750-16)18.773119.011917.853717.980717.06377/8-140.86310.87340.82160.82700.785820.9320.97(0.875-14)21.922722.184420.868621.005819.95931"-120.98680.99820.93820.94410.896023.9023.

10、95(1.000-12)25.064725.354323.830323.980122.75841. 螺胚直徑指滾絲前的尺寸，數(shù)值為依經(jīng)驗公式計算而得，在實踐中需驗證。2.標記示例：10-32UNF-2A(或 0.190-32UNF-2A)、3/8-24UNF-2A(或 0.375-24UNF-2A)美制內(nèi)螺紋(2B)常用規(guī)格極限尺寸表(粗牙)公稱尺寸和螺紋系小徑極限中徑極限底孔直徑每英寸牙數(shù)列代號最小最大最小最大大徑min最小最大8-320.13000.13900.14370.14750.1640q cn(0.164-32)3.30203.53063.65003.74654.16563.403

11、.5010-240.14500.15600.16290.16720.19003.75o an3.90(0.190-24)3.68303.96244.13774.24694.826012-240.17100.18100.18890.19330.2160A AC/ 二二(0.216-24)4.34344.59744.79814.90985.48644.404.551/4-200.19600.20700.21750.22240.25005.05« on5.20(0.250-20)4.97845.25785.52455.64906.35005/16-180.25200.26500.27640

12、.28170.3125p arp on(0.3175-18)UNC6.40086.73107.02067.15527.93756.456.603/8-160.30700.32100.33440.34010.37507 QC7.85o nn8.00(0.375-16)7.79788.15348.49388.63859.52507/16-140.36000.37600.39110.39720.4375q on9.20Q 4c9.40(0.4375-14)9.14409.55049.933910.088911.11251/2-130.41700.43400.45000.45650.5000-1 nd

13、 n on(0.50-13)10.591811.023611.430011.595112.700010.6510.909/16-120.47200.49000.50840.51520.562512.05d o on12.30(0.5625-12)11.988812.446012.913413.086114.28755/8-110.52700.54600.56600.57320.6250 13.4513.702文檔來源為:從網(wǎng)絡(luò)收集整理.word 版本可編輯.歡迎下載支持(0.625-11)13.385813.868414.376414.559315.87503/4-100.64200.6630

14、0.68500.69270.750016.40A ft 7016.70(0.750-10)16.306816.840217.399017.594619.05007/8-90.75500.77800.80280.81100.8750A Q on19.30A Q AH19.60(0.875-9)19.177019.761220.391120.599422.22501"-80.86500.89000.91880.92761.0000oo a nOO AC(1.000-8)21.971022.606023.3375t. r . t. t -23.561025.400022.1022.401.

15、 底孔直徑指攻絲前鉆孔直徑，鑄鐵、黃銅等較軟料取小值，鋼、青銅等較硬料取大值。埼鐵、寅銅寺牧物科取小值，詡、青銅等牧假科取大值。2. 標記示例：10-24UNC-2B域 0.190-24UNC-2B)、3/8-16UNC-2B(或 0.375-16UNC-2B)美制內(nèi)螺紋(2B)常用規(guī)格極限尺寸表(細牙)公稱尺寸和螺紋系小徑極限中徑極限-卜i 底孔直徑每英寸牙數(shù)列代號最小最大最小最大大徑min最小最大8-360.13400.14200.14600.14960.1640(0.164-36)3.40363.60683.70843.79984.16563.453.6710-320.15600.164

16、00.16970.17360.1900a no(0.190-32)3.96244.16564.31044.40944.82604.004.2712-280.17700.18600.19280.19700.2160A cc/ pc(0.216-28)4.49584.72444.89715.00385.48644.554.851/4-280.21100.22000.22680.23110.2500C ACc 7d(0.250-28)5.35945.58805.76075.86996.35005.405.715/16-240.26700.27700.28540.29020.3125A OC6.857

17、 on7.20(0.3175-24)6.78187.03587.24927.37117.93753/8-240.33000.34000.34790.35280.3750Q ARo 70(0.375-24)8.38208.63608.83678.96119.52508.458.787/16-200.38300.39500.40500.41040.4375Q QCd n oq(0.4375-20)UNF9.728210.033010.287010.424211.11259.8510.231/2-200.44600.45700.46750.47310.5000A A A(11.40d d OQ11.

18、82(0.50-20)11.328411.607811.874512.016712.70009/16-180.50200.51500.52640.53230.5625A Q OC12.8513.31(0.5625-18)12.750813.081013.370613.520414.28755/8-180.56500.57800.58890.59490.6250A A AR14.45M RQ14.89(0.625-18)14.351014.681214.958115.110515.87503/4-160.68200.69600.70940.71590.7500A 7 AC-1 7 QC(0.750-16)17.322817.678418.018818.183919.050017.4017.957/8-14